Shadowstrike
Warlord
This has bugged me since Civ4 came out: every time there is a new version of Civilization, we lose all the civs from all of the expansion packs, and we go back to a very small collection of civs, only to gradually get them back again over the course of the next few expansions. I get that this requires a lot of new art assets, especially if everything is being redone, but I can't help but feel like each new version of Civ is very stripped down until it gets a lot of expansion packs.